From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Chassis 9-G-111 after completing 2,764 miles.
| Identifier | ExFiles\Box 4\9\ 09-page015 | |
| Date | 1st June 1925 | |
| R.R. 463a (500) (D.S. 17) 29-9-24) J.R.D. EXPERIMENTAL REPORT Expl. No. REF: GWH{George W. Hancock - Head Chateauroux}2/Crn10. 6.25. To Hs.{Lord Ernest Hives - Chair} From G.W.Hancock. COPY - SECRET. REPORT ON CHASSIS 9-G-111 AFTER 2,764 MILES. ENGINE. Engine power good. Compressions even. Lubrication of cyls. good and even (i.e. slight oil streams down cylinder walls after the run). Valves and fittings to L.O.P. E.51951 - these appear to be O.K. Pistons E.53563 with shrunk gudgeon pins and end piece to E.53561/2 and to LoC.2009 - bottom level scraper ring made L shape. These appear to be quite O.K. We have not noticed any gudgeon pin knocks. There is a slight carbon deposit on top of pistons. Periods of engine are bad - 12 to 28 m.p.h. and 30 to 42 m.p.h. 50 m.p.h. engine runs very smooth. 60 to 84 m.p.h. - period very bad. On retard there is a very bad period from 42 to 38 m.p.h. Max. 40 m.p.h. Water pump and drive to L.O.P. E.50308 and 52010 - these are O.K. Controls - turn buckle on starter carburetter was loose and could not be tightened up with reasonable pressure on screw. We should suggest saw cut carried right through on these turn buckles; they are robust enough. All other controls are O.K. Slight leak of oil between cyl. block and crankcase, front end. Slight oil leak round rocker shaft and cover, also oil leak from tappet covers. Inlet pipe to L.O.P. E.51757 - O.K. Exhaust pipe and fittings to L.O.P. E.51605 - O.K. Front and rear engine suspensions O.K. Carburetter and fittings to L.O.P. E.53300 - these are O.K. We have a throttle whistle at 18 to 20 m.p.h. and 38 to 40 m.p.h. Fan to L.O.P. E.53250 - no spring fitted - O.K. Fan belt tightened up three XXXX turns of adjustment nut. Slipper drive O.K. Magneto and dynamo drive to L.O.P. E.52890 - this is O.K. Oil pump to L.O.P. E.50203 - this is quite O.K. We have had trouble with main oil relief valve sticking, but this is now quite O.K. Battery ignition - new distributor contact screw, acid treated to prevent oxydisation. There is no oxydisation, but on the contact of finger a large pit has formed and a corresponding hole in contact screw. We have filed these up and cleaned condenser connections. In checking up timing before doing this we found it 60° early. This has been made O.K. Bonnet and fittings to L.O.P. E.53435 - bonnet is O.K. There are deep depressions on dashboard where bonnet hinge is located at either side, due to chattering of same. The bonnet is a good fit when the car is stationary. All bolts fastening bonnet strips worked loose, one missing. These have all been tightened up. Engine guards as reported, these do not keep the engine clean on either side. On the exhaust side most of the dirt appears to come through the hole allowed for exhaust pipe. We believe that if the flange at this point was made deeper at the front it would tend to contd :- | ||